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Letters Patent No. 97,451, dated Novembre?` 30, 1869.

IMPROVE!) .PLATE FOR BLANKS OF CULTIVATOR-TETH;

The Schedule referred to in these Letters Patent and making part ofthe same.A

To all reliant may concern y Be it known that I, W. H. SINGER, of Iittsburg,

in Athe county of Allegheny, and State of Pennsylvania, have invented a new and .improved Double-Tapered YPlate for the Material of Blanks for Cultvator` Teeth, 85o.; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation ofthe samereierence beingf had to the accompanying di Figure l is a side elevation of the rolls for the mannfactureof such plate, and

Figure 2 is api-an view of such plate, marked for division into blanks. y

It is found expedient to manufacture cultivatorteeth', shovel-plows, &c'., with sides tapering eacn vway from the centre, in order to reduce their weight and cost, and diminish their thickness at the edges where hammering and grinding arerequi'red. Heretofore,v such taper has been produced by plating, hammering, or grinding, which are slowandV ezpensive processes.

My invention consists in aplate, of the proper metal,

run between rollsof such .shapeV as -to give it the required double transverse taper, such plate being of any desired or practical length, and serving as the material out of which 'blanks lmay be cut for immediate formation into shovel-plows or cultivator-teeth. By this method, I not only save the dierenee in expense between hammering'and rolling, but in' the less amount of material required.

In the drawings- ,l

A A arel the rolls, so grooved,'circu.mierentally, as

p 'awiugs, making a part of this` specification, in whichto iorrnbetweeu them spaces a, of lozenge-shape, whichgive the double taper on. each side of the plate, or spaces a', of half-lozenge shape, which give the double taper only on one side of the plate, leaving the other' side flat.

B is the plate, and v b b, in dotted lines, are` the blanks.

I arnaware of the patent of Henry Barnes, August 3, 1869, for plates' for mould-board blanks, whose plateshave longitudinal central ribs along one side, and taper transiiersely in both ways froml that. Barnes plate is manifestly inapplicable to the manuaeture of cultivator-teeth or shovel-plows, which need no4 rib at the centre, and require only the transverse taper. v

I disclaim any and all plates except such as are adapted to vthis manufacture of cultivator-teeth or shovel-plows, or other articles of that'specic nature. Having thus described my invention, p A What I claim as new, and desire to seure by Letters Patent, is-

Asan article of manufacture, the rolled plate herein described, tapering from the centre to the edges on one' or both sides, and suited to be the material whence blanks for cultivator-teeth, plow-shovels, 85e., may be cut.

' To the above specilicatiou of my improvement, I

have set my hand, this 1st day of October, 1869.

, A W. H. SINGER.

, Witnesses: v i

Ones. A. PETTIT,

' SoLoN 0.*KEMON. 

